piron



(N0 Model.)

SLUW COMBUSTION STOVE.

PatentedMa 10,1898.

HENRI JOSEPH PIRON, OF BRUSSELS, BELGIUM.

SLOW-COMBUSTION STOVE.

SPECIFICATION forming part of Letters :Patent No. 603,967, dated May 1o, 189s.

Appliuuuuu ned octuteuie, 1890. saturo. 609,198. (No muda.) ruuuuuud iu Belgium August 17,1s92,1ru.100,997`, iu France September 20,1892,No.224,439; in Austria. September 26, 1892, No. 45,230,I in Germany 001201181 l1, 1892, No. 70,729; in Spain May 3, 1893, No. 14,560, and iu Switzerland September 25,1896,` N0.14,245.

` gium, residing at Brussels, in the Kingdom of Belgium, have invented a new and useful Improved Slow-Combustion Stove with Constant Renewal of Air in the Heated Apartment, (for which patents have been obtained in Belgium August 17, 1892, No. 100,987, and August 6, 1893, No. 104,186, addition; in France September 20, 1892, No. 224,439; in Spain May 3, 1893, No. 14,560; in Germany October 11, 1892,

No. 70,729; in Austria September 26, 1892,No.

45, 230, and in Switzerland September 25,1896,

No. 14,245,) of which the following is a full,

clear, and exact description.

The object of the present invention is to provide a slow-combustion stove containing an improvement of the very greatest importance, according to Awhich the vitiated air of the apartment which is heated is drawn off by the stove, serving at the same time to complete the combustion, the improved stove uniting thus at the same time the advantages of stoves with quick combustion andthose having slow combustion in such manner as to admit of the general application of these apparatuses,more or less discouraged on account of their antihygienic nature. These results, so important in their effects, are attained by a very simple method of construction, consistin gin forming around the receptacle which con tains the fuel an annular space or passage communicating on the one hand with the apartment and on the other in the interior of the furnace at about the height ofthe fire, wherethe air of the apartment drawn into this passage becomes superheated and mixes with the products of combustion, causing complete consumption of the same and thus improving the yield of heat while effecting an economy of fuel.

The improved construction can be effected in two modifications, as follows: According to the one the fresh air reaches the apartment in any desired mannerfor instance, through the doors or windows in the usual manner- While according to the other modification the fresh air is drawn in from outside by a special conduit and heated by the stove before it is 5o dischargedinto the apartment. rlhe two modifications are represented in the accompanying drawings, in which-` Figure 1 is a vertical section of the improved stove without special inlet for fresh air. Fig. 2 5 5 is a transverse section of the same. Fig. `3is a view in elevation of the stove. Fig. 4 is a vertical section of the improved stove with conduit for fresh air coming in from the outside. Fig. 5 is a transverse section of the 6o same. Fig. 6 is an elevation of this modification of the stove. v

As usual in slow-combustion stoves, the improved stove is provided with a feed-hopper P for the fuel, suspended in such a manner that its lower aperture is placed at a given distance above the upper edge of the reholder or fireplace F, in which the ordinary grate is replaced by a closed bottom of refractory material G, so that the air can have 7o no access into the fireplace through the bottom G, as usually happens in the ordinary pattern through the grate thereof; but the air, on the other hand, passes through the side door L, which is operated in such a manner as to control the draft, as usual, and through which the ashes and oinders can be withdrawn when requisite.` To this difference of construction from ordinary slowcombustion stoves there is added, moreover, the most essential, which 8o relatesy to the arrangement of the outer envelop E of the stove. This envelop in place of being directly connected to the fire-holder or fireplace F, as is usually the case, is of a greater diameter and is placed concentrically 8 5 around the lire-holder or fireplace F upon a suitable foot-plate or hollow base S `in such manner as to form around the fireplace an annular passage A, communicating with the interior of the hollow base, of which the side 9o wall is perforated with ornamental openings O, through which the air of the room passes into the annular passage and in order to mix above the fire-holder or fireplace and around the feed-hopper P with the combustion products after superheating against the Walls of the fireplace and to influence thereby the perfect combustion, at the same time removing from the room the vitiated air which it contains, because the same escapes with the products of combustion by the lateral aperture B into the chimney. The advantageous effect is further increased if the heating-surface of the fire-holder or fireplace be increased, which is obtainable by the wavy construction of the wall of thev fire-holder or replace, as shown in Fig. 2. By bringing these projections in contact with the outer envelop E, as shown in the drawings, the annular passage A is divided into numerous separate channels, and it is this form of construction of the air-passage which is preferably employed.

In the modification represented in Figs. 4, 5, and 6 the outer air is drawn in through a conduit G in the lower half of the base S, separated from the upper half thereof by a horizontal plate I-I, which communicates with a second annular space A (formed by a double envelop D, concentric to the envelop E, the heating-surface whereof is increased by gills E) through the passages a ct. The air becoming heated by the envelop E and the gills E flows upward through the double envelop D into the air-chamber, from whence it follows the course above described in connection with the openin gs O in the upper half of the Abase S, which course is indicated by the arrows. This arrangement increases again the heating power of the stove. In this modication the mouth of the feed-hopperis turned to one side and the outlet B is placed at the axis of the stove.

This slow-combustion stove is eminently hygienic and also economical. It may evidently receive all suitable forms of construction without change of principle and remaining within the principle of the invention.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. A slow-combustion stove comprising a fire-holder provided with a closed bottom and a vertically-corrugated wall, and a casing titting against the corrugated wall, providing vertical conduits open at top and bottom between the wall and the casing; substantially as described.

2. A slow-combustion stove comprising a tire-holder provided with a closed bottoni and a vertically-corrugated, wall, an envelop having exterior vertical gills and fitting against the corrugated wall providing vertical conduits open at top and bottom between the wall and the envelop and the casing surrounding the gills and providing vertical hotair conduits open at top and bottom; substantially as described.

HENRI JOSEPH PIRON.

Vltnesses:

AUG. J oERIssEN, GREGORY PHELAN. 

